drivers/net/ethernet/cisco/enic/cq_enet_desc.h

   1 /*
   2  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  *
  18  */
  19
  20 #ifndef _CQ_ENET_DESC_H_
  21 #define _CQ_ENET_DESC_H_
  22
  23 #include "cq_desc.h"
  24
  25 /* Ethernet completion queue descriptor: 16B */
  26 struct cq_enet_wq_desc {
  27         __le16 completed_index;
  28         __le16 q_number;
  29         u8 reserved[11];
  30         u8 type_color;
  31 };
  32
  33 static inline void cq_enet_wq_desc_dec(struct cq_enet_wq_desc *desc,
  34         u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
  35 {
  36         cq_desc_dec((struct cq_desc *)desc, type,
  37                 color, q_number, completed_index);
  38 }
  39
  40 /* Completion queue descriptor: Ethernet receive queue, 16B */
  41 struct cq_enet_rq_desc {
  42         __le16 completed_index_flags;
  43         __le16 q_number_rss_type_flags;
  44         __le32 rss_hash;
  45         __le16 bytes_written_flags;
  46         __le16 vlan;
  47         __le16 checksum_fcoe;
  48         u8 flags;
  49         u8 type_color;
  50 };
  51
  52 #define CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT          (0x1 << 12)
  53 #define CQ_ENET_RQ_DESC_FLAGS_FCOE                  (0x1 << 13)
  54 #define CQ_ENET_RQ_DESC_FLAGS_EOP                   (0x1 << 14)
  55 #define CQ_ENET_RQ_DESC_FLAGS_SOP                   (0x1 << 15)
  56
  57 #define CQ_ENET_RQ_DESC_RSS_TYPE_BITS               4
  58 #define CQ_ENET_RQ_DESC_RSS_TYPE_MASK \
  59         ((1 << CQ_ENET_RQ_DESC_RSS_TYPE_BITS) - 1)
  60 #define CQ_ENET_RQ_DESC_RSS_TYPE_NONE               0
  61 #define CQ_ENET_RQ_DESC_RSS_TYPE_IPv4               1
  62 #define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4           2
  63 #define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6               3
  64 #define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6           4
  65 #define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX            5
  66 #define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX        6
  67
  68 #define CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC         (0x1 << 14)
  69
  70 #define CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS          14
  71 #define CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK \
  72         ((1 << CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS) - 1)
  73 #define CQ_ENET_RQ_DESC_FLAGS_TRUNCATED             (0x1 << 14)
  74 #define CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED         (0x1 << 15)
  75
  76 #define CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_BITS          12
  77 #define CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK \
  78         ((1 << CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_BITS) - 1)
  79 #define CQ_ENET_RQ_DESC_VLAN_TCI_CFI_MASK           (0x1 << 12)
  80 #define CQ_ENET_RQ_DESC_VLAN_TCI_USER_PRIO_BITS     3
  81 #define CQ_ENET_RQ_DESC_VLAN_TCI_USER_PRIO_MASK \
  82         ((1 << CQ_ENET_RQ_DESC_VLAN_TCI_USER_PRIO_BITS) - 1)
  83 #define CQ_ENET_RQ_DESC_VLAN_TCI_USER_PRIO_SHIFT    13
  84
  85 #define CQ_ENET_RQ_DESC_FCOE_SOF_BITS               8
  86 #define CQ_ENET_RQ_DESC_FCOE_SOF_MASK \
  87         ((1 << CQ_ENET_RQ_DESC_FCOE_SOF_BITS) - 1)
  88 #define CQ_ENET_RQ_DESC_FCOE_EOF_BITS               8
  89 #define CQ_ENET_RQ_DESC_FCOE_EOF_MASK \
  90         ((1 << CQ_ENET_RQ_DESC_FCOE_EOF_BITS) - 1)
  91 #define CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT              8
  92
  93 #define CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK       (0x1 << 0)
  94 #define CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK              (0x1 << 0)
  95 #define CQ_ENET_RQ_DESC_FLAGS_UDP                   (0x1 << 1)
  96 #define CQ_ENET_RQ_DESC_FCOE_ENC_ERROR              (0x1 << 1)
  97 #define CQ_ENET_RQ_DESC_FLAGS_TCP                   (0x1 << 2)
  98 #define CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK          (0x1 << 3)
  99 #define CQ_ENET_RQ_DESC_FLAGS_IPV6                  (0x1 << 4)
 100 #define CQ_ENET_RQ_DESC_FLAGS_IPV4                  (0x1 << 5)
 101 #define CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT         (0x1 << 6)
 102 #define CQ_ENET_RQ_DESC_FLAGS_FCS_OK                (0x1 << 7)
 103
 104 static inline void cq_enet_rq_desc_dec(struct cq_enet_rq_desc *desc,
 105         u8 *type, u8 *color, u16 *q_number, u16 *completed_index,
 106         u8 *ingress_port, u8 *fcoe, u8 *eop, u8 *sop, u8 *rss_type,
 107         u8 *csum_not_calc, u32 *rss_hash, u16 *bytes_written, u8 *packet_error,
 108         u8 *vlan_stripped, u16 *vlan_tci, u16 *checksum, u8 *fcoe_sof,
 109         u8 *fcoe_fc_crc_ok, u8 *fcoe_enc_error, u8 *fcoe_eof,
 110         u8 *tcp_udp_csum_ok, u8 *udp, u8 *tcp, u8 *ipv4_csum_ok,
 111         u8 *ipv6, u8 *ipv4, u8 *ipv4_fragment, u8 *fcs_ok)
 112 {
 113         u16 completed_index_flags;
 114         u16 q_number_rss_type_flags;
 115         u16 bytes_written_flags;
 116
 117         cq_desc_dec((struct cq_desc *)desc, type,
 118                 color, q_number, completed_index);
 119
 120         completed_index_flags = le16_to_cpu(desc->completed_index_flags);
 121         q_number_rss_type_flags =
 122                 le16_to_cpu(desc->q_number_rss_type_flags);
 123         bytes_written_flags = le16_to_cpu(desc->bytes_written_flags);
 124
 125         *ingress_port = (completed_index_flags &
 126                 CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT) ? 1 : 0;
 127         *fcoe = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_FCOE) ?
 128                 1 : 0;
 129         *eop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_EOP) ?
 130                 1 : 0;
 131         *sop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_SOP) ?
 132                 1 : 0;
 133
 134         *rss_type = (u8)((q_number_rss_type_flags >> CQ_DESC_Q_NUM_BITS) &
 135                 CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
 136         *csum_not_calc = (q_number_rss_type_flags &
 137                 CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ? 1 : 0;
 138
 139         *rss_hash = le32_to_cpu(desc->rss_hash);
 140
 141         *bytes_written = bytes_written_flags &
 142                 CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
 143         *packet_error = (bytes_written_flags &
 144                 CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ? 1 : 0;
 145         *vlan_stripped = (bytes_written_flags &
 146                 CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) ? 1 : 0;
 147
 148         /*
 149          * Tag Control Information(16) = user_priority(3) + cfi(1) + vlan(12)
 150          */
 151         *vlan_tci = le16_to_cpu(desc->vlan);
 152
 153         if (*fcoe) {
 154                 *fcoe_sof = (u8)(le16_to_cpu(desc->checksum_fcoe) &
 155                         CQ_ENET_RQ_DESC_FCOE_SOF_MASK);
 156                 *fcoe_fc_crc_ok = (desc->flags &
 157                         CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK) ? 1 : 0;
 158                 *fcoe_enc_error = (desc->flags &
 159                         CQ_ENET_RQ_DESC_FCOE_ENC_ERROR) ? 1 : 0;
 160                 *fcoe_eof = (u8)((le16_to_cpu(desc->checksum_fcoe) >>
 161                         CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT) &
 162                         CQ_ENET_RQ_DESC_FCOE_EOF_MASK);
 163                 *checksum = 0;
 164         } else {
 165                 *fcoe_sof = 0;
 166                 *fcoe_fc_crc_ok = 0;
 167                 *fcoe_enc_error = 0;
 168                 *fcoe_eof = 0;
 169                 *checksum = le16_to_cpu(desc->checksum_fcoe);
 170         }
 171
 172         *tcp_udp_csum_ok =
 173                 (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ? 1 : 0;
 174         *udp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_UDP) ? 1 : 0;
 175         *tcp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP) ? 1 : 0;
 176         *ipv4_csum_ok =
 177                 (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ? 1 : 0;
 178         *ipv6 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV6) ? 1 : 0;
 179         *ipv4 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4) ? 1 : 0;
 180         *ipv4_fragment =
 181                 (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT) ? 1 : 0;
 182         *fcs_ok = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_FCS_OK) ? 1 : 0;
 183 }
 184
 185 #endif /* _CQ_ENET_DESC_H_ */